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Slider: move by at least the next increment when using fixed_decimals (#7066)

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fixes https://github.com/emilk/egui/issues/7065
This commit is contained in:
Lukas Rieger
2025-06-29 13:30:39 +02:00
committed by GitHub
parent ab9f55ab01
commit c943720eed
2 changed files with 61 additions and 3 deletions
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15
crates/egui/src/widgets/slider.rs
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@@ -736,7 +736,7 @@ impl Slider<'_> {
let prev_value = self.get_value();
let prev_position = self.position_from_value(prev_value, position_range);
let new_position = prev_position + ui_point_per_step * kb_step;
let new_value = match self.step {
let mut new_value = match self.step {
Some(step) => prev_value + (kb_step as f64 * step),
None if self.smart_aim => {
let aim_radius = 0.49 * ui_point_per_step; // Chosen so we don't include `prev_value` in the search.
@@ -747,6 +747,19 @@ impl Slider<'_> {
}
_ => self.value_from_position(new_position, position_range),
};
if let Some(max_decimals) = self.max_decimals {
// self.set_value rounds, so ensure we reach at the least the next breakpoint
// note: we give it a little bit of leeway due to floating point errors. (0.1 isn't representable in binary)
// 'set_value' will round it to the nearest value.
let min_increment = 1.0 / (10.0_f64.powi(max_decimals as i32));
new_value = if new_value > prev_value {
f64::max(new_value, prev_value + min_increment * 1.001)
} else if new_value < prev_value {
f64::min(new_value, prev_value - min_increment * 1.001)
} else {
new_value
};
}
self.set_value(new_value);
}